Convert ToolbarModel::GetEVCertName() from wstring to string16.

chrome/browser/ui/cocoa/location_bar/location_bar_view_mac.mm

Index: chrome/browser/ui/cocoa/location_bar/location_bar_view_mac.mm
diff --git a/chrome/browser/ui/cocoa/location_bar/location_bar_view_mac.mm b/chrome/browser/ui/cocoa/location_bar/location_bar_view_mac.mm
index 8b32cfbe091b7dab8b2d838a0dc892f7bac7a399..dd6d87240bf25a57121a8b95d0fb05d08d69a853 100644
--- a/chrome/browser/ui/cocoa/location_bar/location_bar_view_mac.mm
+++ b/chrome/browser/ui/cocoa/location_bar/location_bar_view_mac.mm
@@ -620,8 +620,8 @@ void LocationBarViewMac::Layout() {
     location_icon_decoration_->SetVisible(false);
     ev_bubble_decoration_->SetVisible(true);
 
-    std::wstring label(toolbar_model_->GetEVCertName());
-    ev_bubble_decoration_->SetFullLabel(base::SysWideToNSString(label));
+    string16 label(toolbar_model_->GetEVCertName());
+    ev_bubble_decoration_->SetFullLabel(base::SysUTF16ToNSString(label));
   } else if (!keyword.empty() && is_keyword_hint) {
     keyword_hint_decoration_->SetKeyword(short_name,
                                          is_extension_keyword);